| Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453) |
|---|
| 03/31/1981 | US4259185 Sludge thickening apparatus |
| 03/31/1981 | US4259182 Waste treatment apparatus |
| 03/31/1981 | CA1098461A1 Method for depolluting fresh water- and salt water bodies from crude oil, petroleum products and their derivatives |
| 03/25/1981 | EP0025597A1 Process and plant for the activated-sludge purification of waste water |
| 03/25/1981 | EP0025589A1 Process and apparatus for the biological treatment of aqueous waste in a pure oxygen-activated sludge/ozone system |
| 03/24/1981 | US4258132 Process for producing an agglutinating substance utilizing dematium ATCC 20524 |
| 03/24/1981 | US4257897 Aerobic sludge treatment |
| 03/24/1981 | CA1098224A1 Waste water treatment |
| 03/19/1981 | WO1981000709A1 Means for advanced water treatment |
| 03/19/1981 | WO1981000708A1 Process and plant for clarifying sewage by means of activated sludge |
| 03/18/1981 | EP0025369A1 Process to accelerate the natural evolution of a product, and applications |
| 03/18/1981 | EP0025309A1 Downflow bioreactor |
| 03/17/1981 | US4256580 Waste water purifying plant |
| 03/17/1981 | US4256575 Apparatus and method for treatment of liquids |
| 03/17/1981 | US4256574 Ozone disinfection system |
| 03/17/1981 | US4256573 Process for biological treatment of waste water in downflow operation |
| 03/17/1981 | CA1097578A1 No translation available |
| 03/11/1981 | EP0024758A1 An oxidative biological purification process for waste water |
| 03/11/1981 | EP0024627A2 Process for dissimilatory denitrification of tobacco materials |
| 03/11/1981 | EP0024422A1 Water purification system employing ozone injection. |
| 03/10/1981 | US4255360 Water aerator and method |
| 03/10/1981 | US4255266 Water purification process |
| 03/10/1981 | US4255262 Hydraulic powered mixing apparatus |
| 03/03/1981 | US4253966 Process for biological denitrification of waters |
| 03/03/1981 | US4253957 Marine sewage disposal |
| 03/03/1981 | US4253956 Apparatus for the anaerobic purification of waste water |
| 03/03/1981 | US4253949 Sewage treatment-flotation apparatus |
| 03/03/1981 | US4253947 Removal of cellular material by washing |
| 03/03/1981 | CA1096977A1 Injectors with deflectors for their use in gassing liquids |
| 03/03/1981 | CA1096976A1 Process and apparatus for waste water treatment |
| 03/03/1981 | CA1096975A1 Activated sludge treatment method of waste water |
| 03/03/1981 | CA1096794A1 Treatment process |
| 02/24/1981 | US4252654 Oxidation with ozone |
| 02/17/1981 | US4251371 Device for the biological purification of waste water |
| 02/17/1981 | US4251370 Device for biological digestion of sewage |
| 02/17/1981 | US4251365 Low energy gas transfer system |
| 02/17/1981 | US4251359 On-site wastewater treatment system |
| 02/17/1981 | CA1096064A1 Aerobic-anaerobic sludge digestion process |
| 02/17/1981 | CA1096063A1 Combination of a biological dry toilet and a biological waste water purifying plant |
| 02/17/1981 | CA1096062A1 Waste material digesters |
| 02/10/1981 | US4250040 Gravity filtration, intermittent ozonization and periodic backwashing |
| 02/10/1981 | US4250033 Excess-growth control system for fluidized-bed reactor |
| 02/10/1981 | US4249863 Surface aerator impeller |
| 02/03/1981 | US4248972 For production of methane gas |
| 02/03/1981 | US4248707 Magnetic chamber |
| 01/28/1981 | EP0022784A1 Manure gas plant for the batch treatment of waste |
| 01/28/1981 | EP0022770A1 Treatment of sea discharged sewage |
| 01/27/1981 | US4247645 Anaerobic diodegradation by microorganisms and hydrolase-type enzymes; water pollution |
| 01/27/1981 | US4247395 Sewage treatment process and apparatus |
| 01/27/1981 | US4247050 Fluid reflecting member for use in a fluid dispersing nozzle unit |
| 01/27/1981 | CA1094700A1 Water recycling system |
| 01/22/1981 | WO1981000102A1 Waste disposal apparatus |
| 01/22/1981 | WO1981000101A1 A device for flushing and aerating a surface coated with microorganisms in a plant for biological purification of waste water |
| 01/20/1981 | US4246114 Aerobic waste treatment package |
| 01/20/1981 | US4246111 Apparatus for biological treatment of waste water |
| 01/20/1981 | US4246101 Water recycling system |
| 01/20/1981 | US4246100 Composition and method for the treatment of sewage |
| 01/20/1981 | US4246099 Aerobic/anaerobic sludge digestion process |
| 01/20/1981 | CA1094237A1 Rotating biological contactor |
| 01/13/1981 | US4244821 Backflushing system |
| 01/13/1981 | US4244815 Process and apparatus for the aerobic biological purification of liquid wastes containing organic pollutants |
| 01/13/1981 | CA1093716A1 Biological sewage treatment plant |
| 01/13/1981 | CA1093282A1 Apparatus and method for dissolving gases in liquids |
| 01/07/1981 | EP0022120A1 Process for breaking and working-up oily and fatty emulsions |
| 01/07/1981 | EP0021606A1 Apparatus and process for treating a liquid material while it is subjected to a centrifugal force |
| 01/07/1981 | EP0021570A1 Process and apparatus for the treatment of waste water |
| 01/07/1981 | EP0021470A1 Hollow stirrer for gasing a liquid |
| 01/07/1981 | EP0021378A1 Process for the biological purification of waste water |
| 01/07/1981 | EP0020388A1 Method for treating water |
| 01/06/1981 | US4243616 Air diffuser |
| 01/06/1981 | US4243521 Method and apparatus for aerobically treating wastewater |
| 01/06/1981 | CA1093227A1 Slurry tanks |
| 01/06/1981 | CA1093226A1 Closed loop waste treatment and water recycling toilet system |
| 01/06/1981 | CA1093117A1 Device and process for the aeration of water |
| 01/06/1981 | CA1092788A1 Gas/liquid contacting |
| 12/30/1980 | US4242448 Carbonates |
| 12/30/1980 | US4242289 Apparatus for the removal of gases, especially air, in fluids |
| 12/30/1980 | US4242199 Oxidizing gas selected from air, oxygen, ozone, and chlorine |
| 12/30/1980 | CA1092730A1 Process for the continuous treatment of wet sludge from a sewage treatment plant |
| 12/30/1980 | CA1092360A1 Process for recovery of selected metal values from waste waters |
| 12/23/1980 | US4241227 Solvent extraction of phenols, tar bases, volatiles |
| 12/23/1980 | US4240990 Aeration propeller and apparatus |
| 12/23/1980 | US4240906 Liquid media clarifier |
| 12/23/1980 | US4240905 High solids mixture aeration method |
| 12/23/1980 | CA1092259A1 Installation for anaerobic purification of waste water |
| 12/23/1980 | CA1092039A1 Process for culturing cells |
| 12/16/1980 | US4239620 Cyanide removal from wastewaters |
| 12/10/1980 | EP0019733A1 Process for optimalizing the metabolic activity of micro-organisms in the substrate of a biologic reaction system |
| 12/09/1980 | US4238338 Apparatus for the treatment of sewage |
| 12/09/1980 | US4238337 Methane gas producer using biological decomposition of waste matter |
| 12/09/1980 | US4238336 Sludge diffusion method and apparatus |
| 12/09/1980 | US4237693 Energy recovery system |
| 12/09/1980 | CA1091369A1 Apparatus for anaerobic digestion of biodegradable waste material |
| 12/02/1980 | US4237003 Process for biological purification of liquid wastes |
| 12/02/1980 | US4237002 Absorption on activated carbon of impurities in waste liquid which inhibit its biological treatment |
| 12/02/1980 | CA1090925A1 Methods and apparatus for use in water purification particularly sewage treatments |
| 11/27/1980 | WO1980002556A1 On-site wastewater treatment system |
| 11/26/1980 | EP0019552A1 Process for the purification of waste water and/or industrial water containing hydrocarbons |
| 11/26/1980 | EP0019248A2 Rotating disc assembly for a mechanical and biological waste water treatment plant |
| 11/26/1980 | EP0019216A1 Process for purifying waste water |